① Density of PA56 is 1.14g/cm3, which is significantly lower than polyester’s 1.4g/cm3. It can reduce weight of corresponding military clothing and equipment by 18%.
② Saturated water absorption rate of PA56 can reach 14%, which is much higher than water absorption rate of polyester, even higher than saturated water absorption rates of PA66 and PA6 of 8% and 10%. Excellent moisture absorption and drainage rate greatly improves wearing comfort.
③ Glass transition temperature of PA56 is 45℃~50℃, which is lower than PA66 and much lower than polyester. When used in high-cold and high-altitude areas, PA56 is neither brittle nor hard when worn, which greatly improves material's low-temperature resistance.
④ Melting point of PA56 is around 260℃, which is close to melting point of nylon 66 and polyester, much higher than melting point of PA6, and can be used for a long time below 140℃.
⑤ PA56 has better wear resistance than cotton, wool, and viscose fibers. Adding such fibers to blended fabrics can greatly improve its wear resistance, extend service life, and reduce usage costs.
⑥ PA56 has high dyeability and lower dyeing temperature than PA66.

 

Compared with PA66, PA56 is more environmentally friendly in its production path; in terms of application performance, due to unique microstructure of PA56 that "liberates hydrogen bonds", fabric is more flexible, more temperature-resistant, and drier.

PA56 uses recyclable plant raw materials, which can absorb CO2 in atmosphere during plant growth and reduce greenhouse gas impact factors throughout life cycle. Compared with traditional petroleum-based PA66, bio-based PA56 can reduce consumption of non-renewable resources by about 50%.

Unlike PA66, PA56 contains unsaturated hydrogen bonds and retains biological "activity". Unique Young's modulus value of material scientifically adjusts feel of fabric, providing strong and wear-resistant properties while also giving it a natural, soft touch and excellent drape.

Fiber glass transition temperature (Tg value) of PA56 is 45~55℃, which is lower than PA66 (60℃). Therefore, PA56 can remain soft in large temperature differences and is not brittle or hard when worn in some special areas, such as deserts, snowy mountains, and high altitude areas.

Thermal conductivity of PA56 is higher than that of PA66, heat conduction is faster, and cooling coefficient on contact is higher. At the same time, "active" structure in molecular chain enables it to absorb moisture faster and conduct heat to outside of fabric, allowing it to maintain a cool body feel even when worn for a long time.
Let’s summarize comparison results of PA56 modified materials:
1. Melting point of PA56-G30 is between PA66-G30 and PA6-G30, which are 255.6℃, 263.3℃ and 220.0℃ respectively.
2. PA56 has a high amide group density and low intramolecular hydrogen bond density, so it has the highest water absorption rate, resulting in the most significant decrease in wet tensile strength and the most significant increase in wet impact strength of PA56-G30.
3. PA56-G30, like PA66-G30 and PA6-G30, shows excellent long-term thermal oxygen aging performance, with performance retention rates of ≥90%.
4. Due to influence of high water absorption, PA56-G30 has the worst hydrolysis (alcohololysis) resistance, with tensile strength and flexural modulus retention rates of only 6.3% and 28.4%.
5.PA56-G30 shows good oil resistance, which is comparable to oil resistance of PA6-G30 and PA66-G30.
To sum up, PA56 has a high water absorption rate, which results in large changes in wet properties and poor hydrolysis (alcoholysis) resistance. Therefore, it is initially judged that it cannot directly replace PA66 in automotive applications.

1. Packaging of this product is moisture-proof packaging. Moisture content is constant before opening. It is recommended to use it as soon as possible after opening. Before using opened product, it is recommended to perform necessary dehumidification and drying to ensure quality of injection molded product and stability of injection molding process. Drying temperature should not be too high, and maximum should not exceed 110℃; drying time should not be too long, and maximum should not exceed 5 hours.
2. Injection molding temperature should not be too high. For fiber-added modified materials, recommended temperature is 280℃ ~ 305℃. Excessively high temperatures can easily cause bio-based polyamide resin to crack at high temperatures, resulting in reduced product performance.
3. During injection molding production process, mold temperature should be controlled, preferably 60 ℃ ~ 90 ℃. It is recommended that mold temperature be kept at upper limit of temperature range. Too low a mold temperature will lead to poor fluidity of bio-based polyamide resin, poor surface finish or surface defects of product, high shrinkage or brittle fracture of product, leading to a decrease in quality, etc.